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標題: 1-2+3-4+5-6.......一直至N [打印本頁]

作者: f66666602 時間: 2007-8-13 02:14
標題: 1-2+3-4+5-6.......一直至N
#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
  int n,i,total1,total2,sum;
  printf("\n請輸入整數n值：");
  scanf("%d",&n);
  total1=0;
  total2=0;
  sum=0;
  for(i=1;i<=n)
  {
  if((i++ % 2)==0)
total1 += i;
  else
total2 += i;
  }
  sum=total2-total1;
  printf("1-2+3-4+5-6+-.....+-n值為：%d\n",sum);
  system("PAUSE");
  return EXIT_SUCCESS;
}

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